Add script that displays network config on startup

Author: gthiemonge

templates/octaviaamphoracontroller/bin/octavia_controller_start.sh

@@ -21,4 +21,7 @@ if [ "$1" = "octavia-health-manager" ]; then
     /usr/local/bin/container-scripts/octavia_hm_advertisement.py octavia
 fi
 
+# Ignore possible errors
+/usr/local/bin/container-scripts/octavia_status.py || true
+
 exec /usr/bin/$1 --config-file /usr/share/octavia/octavia-dist.conf --config-file /etc/octavia/octavia.conf

templates/octaviaamphoracontroller/bin/octavia_status.py

@@ -0,0 +1,45 @@
+#!/usr/bin/env python3
+#
+# Copyright 2024 Red Hat Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the "License"); you may
+# not use this file except in compliance with the License. You may obtain
+# a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+# License for the specific language governing permissions and limitations
+# under the License.
+
+from pyroute2 import IPRoute
+
+ip = IPRoute()
+
+ifaces = {}
+
+for link in ip.get_links():
+    attrs = {k: v for k, v in link['attrs']}
+    ifaces[link['index']] = attrs['IFLA_IFNAME']
+
+for addr in ip.get_addr():
+    attrs = {k: v for k, v in addr['attrs']}
+    print(f"addr {attrs['IFA_ADDRESS']}/{addr['prefixlen']} "
+          f"dev {ifaces[addr['index']]}")
+
+for route in ip.get_routes():
+    attrs = {k: v for k, v in route['attrs']}
+    if attrs['RTA_TABLE'] != 254:
+        continue
+    suffix = f"/{route['dst_len']}" if route['dst_len'] else ""
+    route_str = f"route {attrs.get('RTA_DST', 'default')}{suffix} "
+    if attrs.get('RTA_GATEWAY'):
+        route_str += f"via {attrs.get('RTA_GATEWAY')} "
+    route_str += f"dev {ifaces[attrs['RTA_OIF']]} "
+    if attrs.get('RTA_PREFSRC'):
+        suffix = f"/{route['src_len']}" if route['src_len'] else ""
+        route_str += f"prefsrc {attrs.get('RTA_PREFSRC')}{suffix} "
+
+    print(route_str)